meil

That issue raises its head with a Free-mo get-together. They have a polarity tester which is used to ensure across-baseboard polarity. See: https://forum.mrhmag.com/post/dcc-polarity-tester-12196234

Yes - and the easiest "Power District" is a baseboard. In other words each separate baseboard is treated as a power district with its own circuit breaker/district cut-out. That way a short on a baseboard will not affect the other boards.

Yes but they just do not get it do they? The ship may well have crashed into the bridge but the cause of the bridge collapse against such an obvious hazard that translates into a high risk (because of the consequences) is firmly down to the inadequate pier protection and therefore the owner and operator of the bridge. You cannot have a totally inadequate protection against the blindly obvious risk of ship contact and not be implicated in the cause of the bridge collapse.

You are not asking about Single Line Working you are asking about the Working of a Single line. Two completely different things. To answer your real question - it depends and one line can be bi-directional and the other a dedicated route.

Not necessarily - you could put a resistor in series with the heater to work on your power supply. Of course your heater wouldn't be 50W any more but it might be warm enough.

There's nothing stopping you adding a resistor in series with the relay coils to reduce voltage across them.

Wolverhampton (High Level), Tipton and Dudley Port

Well I have been in the Civil Engineering game for 50 years and such considerations of this sort were always in place.

Compare and contrast as they used to say:

If you are a club - ie an unincorporated body then look at Charitable incorporated organisation ( CIO )

Meths is ethyl alcohol together with Methyl Alcohol and Pyridine that gives it the a nasty taste together with a purple dye. Surgical Spirits is Ethyl alcohol and benzalkonium chloride. Surgical sprit is clear. White spirit is a hydrocarbon derived from petroleum. It's a mixture of chemicals.

For the sort of wire stripping you will be doing for DCC I suggest you look at these: https://workshopping.co.uk/products/auto-electrical/automatic-wire-stripping-tool-pistol-grip?srsltid=AfmBOopt_8rZASLxjl6X6kniqHO_kL403wWIHpqrC9AnicBbALfX5xPiKow

The mileage from London to Birmingham is about 120miles. Are you seriously telling me that over half the route mileage is properly to be in tunnel! What are we building here another cross-rail or an extension to the jubilee line? This simply utter madness.

DAS clay or fine Polyfilla. Polyfilla would be easier to work.

The elephant in the room is this: the first stop out of London is the NEC/Birmingham Airport. People assume that the HS2 will greatly benefit Birmingham by linking it with London. Unfortunately what is most likely to happen is that the area around the NEC will become Birmingham's Canary Wharf with high value service industry decanting from the city centre to the NEC. In fact as the NEC is now entirely in the hands of the private sector I could well see the demise of the NEC and the redevelopment of it's area as Birmingham Canary Wharf. Birmingham will then begin a rapid decline.